To reach the full spectrum of pre-university students and schools, such materials must truly be inexpensive, as they must be acquired in significant numbers and be replaced regularly due to the natural wear-and-tear of hands-on education materials.
To reach the full spectrumof pre-university students and schools, such materialsmust truly be inexpensive, as they must be acquired in significantnumbers and be replaced regularly due to the naturalwear-and-tear of hands-on education materials.