<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

	<xsl:template match="/">
		<xsl:apply-templates select="/students/student/homeworks" /> 
	</xsl:template> 

    <xsl:template match="homeworks">
        <xsl:apply-templates select=".//id" /> 
    </xsl:template>

</xsl:stylesheet>