2020-08-042020-08-042020-04-29http://hdl.handle.net/123456789/11668engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/desirable difficultiesdistributed practicespacinglag effectmathematics learningprocedural knowledge150No Robust Effect of Distributed Practice on the Short- and Long-Term Retention of Mathematical ProceduresAufsatzMathematikLernenVerfahrenstechnikWissen