Science Students with Numerical Difficulties what are we

Science Students with Numerical Difficulties: what are we doing for them? Corinne M. Spickett, John Wilson, Jim Boyle University of Strathclyde, Glasgow, UK.

OVERVIEW OF THE PRESENTATION Numerical difficulties: extent of the problem Overall incidence Range of problems Strathclyde study Support for numerical difficulties Typical accommodation in HE Is it enough? Alternative Support Approach: BCalc Description of BCalc Development of BCalc Accommodation versus Academic Standards

Difficulties in Mathematics • There has been an acknowledged decline in standards of numeracy and mathematical ability in recent years. • Much of this may relate to changes in teaching practice in schools: • Class size • Use of calculators • teaching methods & lack of ‘drill and practice’ • This has led to anxiety about mathematics, lack of experience and poor motivation. • A sub-set of these have extreme problems resulting from the learning disability DYSCALCULIA.

Dyscalculia or ‘Mathematics Disorder’ A learning disability that affects numerical and mathematical skills Mathematical ability…. is substantially below that expected given the person’s age and ageappropriate education …. . … whereas intellectual functioning falls within or above the normal range. Dyscalculia has genetic, cognitive and neurological causes.

Manifestations of Dyscalculia FUNDAMENTAL PROBLEMS l Counting l Reading and writing numerals l Number seriation l Numerical procedures l Principles, concepts and laws of arithmetic PROBLEMS IN APPLICATION l Telling the time and judging elapsed time l Calculating prices and handling change l Measuring (e. g. temperature or speed) l Problems with ratios, fractions, decimals, changing units

Incidence of Dyscalculia • Large-scale surveys of school-children suggest a prevalence of around 6 -7% with no gender differences. • Half of those with dyscalculia have problems with number only and the rest have comorbid problems with reading. • Prevalence of dyscalculia in adults and in students in higher education is largely unknown.

Strathclyde Study to assess Numerical Difficulties in University Students (2003) A self-report questionnaire was distributed to: 1 st and 2 nd Year bioscience and pharmacy students in practical laboratories at Strathclyde. 1 st Year bioscience students at calculations tutorials at Coventry. 1 st and 3 rd Year biological science and biology students surveyed in practical classes at Liverpool Hope.

Format of the Questionnaire - General

Format of the Questionnaire - Specific Algebraic functions Manipulating Equations Logarithms Powers of 10 Decimal places Fractions Mental arithmetic Moles and Molarity Conversions between units Drawing Graphs Dilutions

Findings of the Strathclyde Survey

Implications of the Strathclyde Survey Prevalence of numerical difficulties among biological science students differs between 3 universities in the UK. Lower-bound prevalence rate of at least 10% amongst 1 st and 2 nd years at Strathclyde. Dyscalculic students will represent a fraction of this (1/10 ? ) Algebra and logs significantly discriminated those reporting problems (75%) At Strathclyde, numerical skills seem to have declined even further since 2003!

Support for Students with Numerical Difficulties: Remedial Mathematics Support Various approaches in many UK universities: • Pre-entry classes and testing (e. g. Queen Margaret) • Central support schemes for voluntary participation (e. g. Maths Learning Support Centre, Loughborough) • Remedial classes for specific courses on a voluntary basis. • Incorporation of remedial maths / numerical skills teaching into curriculum

Remedial Support: is it working? POSITIVE POINT: For most students, remedial classes in numerical skills allow them to achieve acceptable standards CONCERNS: “Remedial classes” are becoming incorporated into the curriculum as standard teaching. Time required to teach numerical skills is detracting from teaching of the main subject

Support for Students with Dyscalculia Dyscalculic students are entitled to accommodations that are intended to compensate for their disability. These are generally similar to those offered to students with other disabilities such as dyslexia. Ø extra time in examinations Ø use of a calculator Ø access to notes/memory aids Ø alternative formats for questions and answers

Is the Support for Dyscalculia Enough? Remedial classes are of limited value in this case. Accommodations such as use of calculators / crib sheets are of limited use as they still require mathematical ability, number recognition, etc. We attempted to offer a technology-based support for a dyscalculic student who presented on a biological science course at Strathclyde…. . BCalc

The Development of BCalc Collaborative project between departments of Bioscience, CIS, Special Needs and Psychology Aimed to produce a software system to help answer specific questions for 2 nd year biological calculations: Ø Interconversions of scientific units Ø Preparation of solutions Ø Dilutions [Did not attempt to include p. H and p. Ka calculations]

Examples of Biological Calculations PREPARING A SOLUTION: How much potassium sulfate (MW 174) would you weigh out to prepare 200 m. L of a 50 m. M solution? Weight (g) = MW x Conc (M) x Vol (L) DILUTIONS: a) What volumes of stock and diluent are needed to prepare 100 m. L of 2 m. M solution from a 50 m. M stock b) What is the dilution factor? c) C 1 x V 1 = C 2 x V 2 Diluent = V 2 – V 1 d)Dilution Factor = C 2/C 1

BCalc was initially developed for the HP Jornada • MFC App. Wizard to create dialog -based project • Microsoft e. Mbedded Visual C++ • 7 separate functions are called from main dialog box • 8 person-weeks of development effort (CIS project student)

The HP Jornada Screen

Evaluation of BCalc on the HP Jornada ¡ The need for training ¡ Less confident than with paper conversion tables ¡ More ‘step by step’ help ¡ Scientific notation vs powers of ten: 5. 000 e-002 vs 5 x 10 -2 ¡ Rounding errors difficult to detect and control ¡ New user interfaces are required

Adaptation of BCalc to more convenient user interfaces: Pocket PC and Palm. OS versions

Latest application: mobile phones

Further Research and Directions • Extend the evaluation of current BCalc by MD students. • Extend the study to other subjects and organisations • Identify particular areas of need that can be used as a basis for developing systems to help with particular problems. • Improve the user-interface of our pilot software support system and assess its value to students with MD. • To investigate the feasibility of scalable software solutions (XCalc). All currently hampered by lack of funding !!!

Support versus Academic Standards • Not all types of compensatory support are regarded as academically valid, depending on core learning and assessment criteria. • Software to support specific academic/professional calculations could allow dyscalculic students to succeed in key tasks, but may be controversial • Important to distinguish between inability to grasp theoretical concepts, and inability to conduct mathematical routines during application of the concepts.

Is this a problem with Dyscalculic Biological Sciencists? • Many concepts that are fundamental are intrinsically numerical (e. g. moles, statistics) • Can people learn to use BCalc if they don’t understand the principles ? • If they don’t understand the principles, can they be biological scientists ? • Potential for use in employment vs universities?

ACKNOWLEDGEMENTS • • John Wilson Jim Boyle Deborah Finn Graham Martin Inga Tulloch Jan Coveney Simon Wagstaff Clare Trott (CIS, Strathclyde) (Psychology) (Special Needs Service) “ “ “ (CIS, Strathclyde) (Coventry) (Liverpool Hope) (LTSN / HEA) Strathclyde R&D Fund