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Product Development Assets
 12 Months Ended
Apr. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Product Development Assets Product Development Assets
Product development assets, net were included in Other non-current assets on the Consolidated Statements of Financial Position and consisted of the following at April 30:
20232022
Book composition costs$19,067 $20,574 
Software costs11,338 17,479 
Content development costs1,916 3,405 
Product development assets, net$32,321 $41,458 
Product development assets include $7.4 million and $4.4 million of work-in-process as of April 30, 2023 and 2022, respectively. As of April 30, 2023 and 2022 this is primarily for book composition costs.
Product development assets are net of accumulated amortization of $297.4 million and $269.7 million as of April 30, 2023 and 2022, respectively.