Brain Training Homeschooling Includes Shipping Problem set for the Abacus and Mental Calculation Proficiency Test. - Set Contents: Abacus Print Collection Grade 4, Grade 5, Grade 6 - Number of Pages: Problem sets for each grade - Purpose: Preparation for the Abacus Proficiency Test Includes shipping. Thank you for viewing. No discounts are offered. Please comment if you would like to purchase multiple items together. Prices have increased since October.