Mathematics Blackboard Wall Clock

The clock is made of premium wood with white letters and numbers and is suitable for use in the home, in the classroom, in the office, etc. It is a fun and challenging brain exercise to use this wall clock. You might be able to solve the riddle of time if you can solve it. Originally listed at $22.99, is now marked down to just $17.99. That saves you $5 off the regular price. Shipping adds $5.99 or free on orders over $35 or select in-store pickup to avoid the shipping fee. Sales tax is charged in most states.