Download or read book Abacus written by Ruth Merttens and published by Ginn. This book was released on 1999 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text has photocopiable assessment sheets for each "Abacus" unit (or pairs of units). Each sheet is accompanied by guidance on how to use and interpret the sheet, including: advice on delivering the test; diagnostic advice; remediation activities; and oral mental maths questions.